Normal-state electronic structure in the heavily overdoped regime of Bi1.74 Pb0.38 Sr1.88 Cu O6+δ single-layer cuprate superconductors : An angle-resolved photoemission study

Yang K.

Xie B. P.

Shen D. W.

Zhao J. F.

Ou H. W.

Wei J.

Wang S.

Wang Y. H.

Lu D. H.

He R. H.

Arita Masashi

Qiao Shan

Ino Akihiro

Namatame Hirofumi

Taniguchi Masaki

Xu F. Q.

Kaneko Nobuhisa

Eisaki Hiroshi

Feng D. L.

Physical Review B - Condensed Matter and Materials Physics

We explore the electronic structure in the heavily overdoped regime of the single-layer cuprate superconductor Bi1.74 Pb0.38 Sr1.88 Cu O6+δ. We found that the nodal quasiparticle behavior is dominated mostly by phonons, while the antinodal quasiparticle line shape is dominated by spin fluctuations. Moreover, while long range spin fluctuations diminish at very high doping, the local magnetic fluctuations still dominate the quasiparticle dispersion, and the system exhibits a strange metal behavior in the entire overdoped regime.

bismuth compounds

lead compounds

strontium compounds

high-temperature superconductors

band structure

photoemission

quasiparticles

spin fluctuations

phonons

doping

eng

American Physical Society

Copyright (c) 2006 The American Physical Society.

[ISSN] 0163-1829

[DOI] 10.1103/PhysRevB.73.144507

[NCID] AA11187113

[DOI] http://dx.doi.org/10.1103/PhysRevB.73.144507